/*-
 * Public platform independent Near Field Communication (NFC) library
 * 
 * Copyright (C) 2011, Romuald Conty, Romain Tartière
 * 
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 */

#include <host/nfc.h>
#include <host/nfc-emulation.h>

#include "iso7816.h"

int nfc_emulate_target(nfc_device_t* pnd, struct nfc_emulator *emulator)
{
	byte_t abtRx[ISO7816_SHORT_R_APDU_MAX_LEN];
	size_t szRx = sizeof(abtRx);
	byte_t abtTx[ISO7816_SHORT_C_APDU_MAX_LEN];
	int res = 0;
	
	if (!nfc_target_init(pnd, emulator->target, abtRx, &szRx)) {
		return -1;
	}
	
	while (res >= 0) {
		res = emulator->state_machine->io(emulator,
						  abtRx, szRx,
						  abtTx, sizeof (abtTx));
		if (res > 0) {
			if (!nfc_target_send_bytes(pnd, abtTx, res, NULL)) {
				return -1;
			}
		}
		if (res >= 0) {
			if (!nfc_target_receive_bytes(pnd, abtRx, &szRx, NULL)) {
				return -1;
			}
		}
	}
	return (res < 0) ? res : 0;
}
